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countr · 04-06-2021, 06:35 PM

Found this old post and could not find any other on the subject. But the 67 GMC I am working on has the sp44 3.54 ratio but has J04AB on the spid and part number 3903540 with a 305 v6. Just wondering would this be posi[traction or no spin and what is the difference?

Thanks Russ

04-06-2021, 06:35 PM	#6
countr Registered User Join Date: Dec 2015 Location: Russell, Iowa Posts: 2,010	Re: Need rear axle enlightenment Found this old post and could not find any other on the subject. But the 67 GMC I am working on has the sp44 3.54 ratio but has J04AB on the spid and part number 3903540 with a 305 v6. Just wondering would this be posi[traction or no spin and what is the difference? Thanks Russ